We had a 737 come in with the autopilot disengaging randomly during cruise. I spent 2 hours digging through schematics and testing servos, nothing. Then I noticed a loose pin on the FCC connector. I bent it back with a paperclip from my pocket and it worked perfect. Has anyone else had a stupid fix like that save a whole shift?
I spent last weekend pulling an old 530 out of a Cessna 172 and putting in a 750. The 530 worked fine for years, but after flying with the 750, I just can't go back. The touchscreen alone saves so much time programming flight plans. No more twisting knobs for five minutes every time you need to change a waypoint. Has anyone else made this swap and felt the same way?
Turned out it was a corroded terminal block hiding behind a panel in the tail section. Anybody else waste a whole shift just to find a simple ground fault on older avionics?
Found an old technical bulletin from 1985 in the shop archives last week. It had the sensitivity specs for the Collins ADF-462. Thing pulled in signals at 2 microvolts. Makes me wonder, I just checked the data sheet on a new digital receiver we installed in a King Air 6 months ago and its sensitivity is only 5 microvolts. Old analog gear was just built different. Plus the analog filters had a warmth on weak signals that the digital ones just don't capture. The bulletin even mentioned a field mod to reduce noise floor by 1.5 dB with a simple ground strap change. My old lead tech, Gary, used to swear by those old units. He retired in 2018 but I bet he'd get a kick out of this. Anyone else find old service bulletins that made you rethink new gear?
Found a Tektronix 465B from the 80s for $150 at a surplus sale, but I also needed a good DMM for continuity checks. I went with the old scope because it was just too good of a deal, and I figured I could grab a cheap secondhand meter later. The scope works fine for waveform tracing, but man, calibrating it took forever. Anyone else roll the dice on older gear for avionics work?
I was working on a CRJ200 last Tuesday and needed to trace a pin issue on the autopilot servo. My coworker swore by his $30 no-name box from eBay, so I borrowed it instead of grabbing my own from the truck. Hooked it up and half the pin labels were wrong, spent 45 minutes chasing a problem that didn't exist. Swapped to my trusted DMC breakout tool and found the real short in under 10 minutes. Anyone else had bad luck with cheap pin testing gear? I'm not making that mistake again.
I was doing a walkaround on a CRJ900 last Tuesday at the hangar in Memphis and noticed three different log entries from other techs that completely ignored the bonding jumper resistance on the flap actuator panels. That might not bite you today, but when lightning hits and the bonding path is over 5 milliohms, that actuator becomes a fire risk. Have you ever caught a similar oversight on a preflight or did I just get lucky with the inspection?
Went with the Brymen because it was $80 cheaper (you know, night shift budget life), and honestly it's been just as accurate on the bench so far. Anybody else find a solid budget alternative that beat out the expensive stuff?
I work at a regional MRO in Nashville and last Thursday we had a rush job on a CRJ700. I ended up doing 500 D-sub pin terminations in a single 12 hour shift. That's about one every 90 seconds with stripping, crimping, and testing. My fingers were raw the next day but I swear my speed improved by 20 percent after hour six. Has anyone else ever counted their terminations per shift? I'm curious what the average is for bigger shops.
I was over at a buddy's hangar in Wichita last month and he caught me struggling with a D-sub pin. He handed me his M22520 and I finished the whole harness in 20 minutes. My $30 Amazon special has been in the trash ever since. Anyone else have a tool that wasted years of your time?
Honestly, I was at a bench in Denver last month watching this older guy fix a comms panel, and he showed me how I was using the wrong notch on the crimper. I always used the middle slot for the wire barrel, but he said you gotta use the outer one for the insulation grip first. Has anyone else been doing it the same wrong way or was I just being dumb?
I got a chance to tour the Everett plant last month on a weekday visit. Walking through the 747/777 assembly line hit different. The sheer scale of those wire bundles running through the fuselage was insane. Saw a senior tech repairing a cracked connector on a 777x wing spar. He was using a manual crimper from the 90s, no fancy digital tools. Made me think about how much we rely on old school techniques even with modern planes. Has anyone else toured a big assembly plant and spotted something weird or outdated still in use?
Back in 2018 I was working on a Cessna 172 at a small shop outside Austin. The old paper schematics took me maybe 10 minutes to trace a fault. When we switched to digital tablets in 2020, the same job took 45 minutes because of zoom lag and screen glare on the ramp. I get that digital saves space, but I’ve seen three guys miss a short because the PDF froze mid-pinout. Has anyone else noticed their troubleshooting time double after the paper went away?
I was out at Oakland last Tuesday troubleshooting a DME that would cut out randomly on short final. Spent 3 hours checking antennas, swapping LRUs, even re-terminated the coax. Turned out to be a wire chafed against a bracket behind that panel near the E&E bay door. In my experience you have to physically trace every inch of those wire bundles before you start tossing parts at it. Anyone else ever chased a ghost fault that turned out to be a simple rub?
Swapped out the old vacuum driven AI for a new G5 and everything powered up on the first try. No pinched wires, no flipped pins on the DB9 connector, just clean signal right away. Usually I chase a ground loop or a bad crimp for hours but this one went smooth. The owner even brought me a coffee which never happens. Anybody else have those rare days where nothing fights back?
I work at a shop in Wichita that handles mostly Cessnas and a few Beechcrafts. For the longest time we had this 172 with a G1000 that would lag bad when switching pages or inputs, like a solid 3-4 second delay. The owner just lived with it for about a year. Finally had a slow week so I dug into it. Found out the nav database had like 5 cycles of old data just piling up in there, plus a ton of corrupted flight logs. Deleted all the extra cycles and ran a clean format on the MFD card. After that the response was basically instant. Has anyone else seen this kind of improvement just from purging old database files on these systems?
I was working on a Cessna 172 last Tuesday and kept getting an intermittent nav light failure. Checked every connector, traced the whole harness, even swapped out the power supply module. After 4 hours of frustration I finally noticed a tiny bit of corrosion on a ground screw hidden behind a bracket. Cleaned it up with some emery cloth and everything worked perfect. Has anyone else wasted a whole afternoon on something that simple?
Thought I was saving time by lumping all my grounds onto one bar in the panel. Then a senior guy pointed out my loop interference during a radio check on a Cessna 172 last month. Had to redo 4 connections and my crosstalk issues vanished. Anyone else ever get called out for a seemingly minor wiring habit that turned out to be a big deal?
I've been tracking my work for a while now, just out of curiosity. Back in March I hit 10,000 wire terminations on various harnesses and connectors without having to redo a single one. That includes D-sub pins, circular connectors, and those tiny Molex micro-fits. It surprised me because I remember my first year I'd screw up every 10th or 15th termination easy. What really made it click was switching to a good quality ratcheting crimper and actually checking my strip length with a gauge every time. Anyone else keep stats on their work like this?
Bought a bargain brand stripper on Amazon. First 10 crimps looked fine. Then the blade slipped on a 50-foot run of RG400. Ruined the whole install. Has anyone found a decent stripper under $150?
Bought a cheapo DMC crimper off eBay for my 747 wiring job. Thought my old ratcheting one was fine for 10 years. First terminal pull test hit 45 pounds instead of the usual 25. Anyone else have a tool they laughed at that turned out to be a lifesaver?
Chasing a 28V DC fault that turned out to be a chafed wire behind the flight deck bulkhead. 4 hours of meter work and a 10 minute fix. Has anyone else had a gremlin that took way longer than it should have?
Honestly, I overheard this old tech at a hangar in Phoenix last month saying how you gotta drop $200 on those shielded leads or your readings are trash. Ngl, I've been using the same $30 set from a surplus shop for three years on bench work and they've never let me down once. I get it if you're troubleshooting RF stuff in the field, but for general continuity and power checks? Overkill. Has anyone else found a solid budget alternative that holds up?
Used to spend all day with a multimeter tracing pins on harnesses. Switched to a DIT-MCO tester six months ago and cut my checkout time by 60 percent. Has anyone else made that jump and dealt with the setup headaches?
I spent 3 hours chasing a ghost issue on a King Air in Bakersfield last month, swapping out a whole comm unit for nothing. Turns out a corroded bonding strap was causing the interference he warned me about 6 months ago. Has anyone else had an old school trick save their butt when the manual said something different?